I'm looking for some challenging bass warm ups/exercises (6 string preferred)

Any suggestions???
I wonder how my bass would sound, hooked to a microwave...


Are You a PROG-HEAD? I am.
go 1234 starting on your b string go down to the c with that pattern then do 5432 from the c string to the b and repeat for 30 minutes
I'll lay waiting, just waiting for my time to come
i picked up this book called "bass exercises" (veryy vague i know).

i've just finished the first set of them and my finger strength has improved greatly pm me and i'll actually check the name of the book